Mickelson, who also won this event in 1996 and 2005, came within a horse-shoed putt of shooting 59 in the first round and never relented. The left-hander carded a 65 on Friday, matched the tournament's 54-hole scoring mark with a 64 on Saturday, and tallied five birdies during the final round to finish at 28- under 256, which tied for the second-lowest score in a 72-hole PGA Tour event.

It was the 41st career PGA Tour win for Mickelson and his first since capturing the Pebble Beach National Pro-Am title last February.

Brandt Snedeker, who entered the final round six strokes off Mickelson's pace, shot 65 at TPC Scottsdale's Stadium Course to finish in second place at 24- under.

Scott Piercy fired a 61 and placed third at 23-under, Ryan Moore (65) took fourth at 22-under and Ryan Palmer (62) finished in fifth at minus-19.